Be mindful of copyright and licensing issues:

Read the fine print.
Don't assume you can download / use multimedia without requesting permission or paying fees, even in a non-profit education setting.
Look for Creative Common licenses to explain acceptable use of media found online.
- About the Licenses

Free online resources:

Be sure to read all of the fine print on how you can use these free resources...

Classic Music Library: This resource includes recordings of music written from the earliest times to the present, including many contemporary composers. Repertoire ranges from vocal and choral music, to chamber, orchestral, solo instrumental, and opera.
Naxos Music Library: This is the most comprehensive collection of classical music available online. It includes the complete Naxos, Marco Polo and Dacapo catalogues of over 85,000 tracks, including Classical music, Jazz, World, Folk and Chinese music. *This resource only allows streaming, no downloads.
Naxos Music Library Jazz: This is one of the most comprehensive collection of Jazz music available online. *This resource only allows streaming, no downloads

AP Images:The Associated Press Photo Archive is an electronic library containing both current photos and a selection of pictures from their 50 million image print and negative library.
Art Collection: From the OhioLINK Digital Resource Commons,The ART Collection provides high-quality, digital images of works of art from museums around the world.
ARTstor: ARTstor is a rich digital library that offers coherent collections of art images and descriptive information as well as the software tools to enable active use of the collections. The ARTstor Library's initial content includes approximately 500,000 images covering art, architecture and archeology. *Downloading images requires setting up and account and accepting restrictions on use.

Educational Films and Documentaries: From the OhioLINK Digital Resource Commons, you will find full-length educational videos covering a wide variety of subjects. The collection currently includes videos from two distributors, Ambrose Video and Films for the Humanities & Sciences.
Films on Demand: This web-based digital video delivery service allows you to view streaming videos from Films Media Group anytime, anywhere, 24/7! Choose from more than 5,500 educational titles in dozens of subject areas. Special features allow users the ability to organize and bookmark clips, share playlists, personalize folders and manage their entire collection through an administrative reporting system.
Swank Streaming Videos: This is a list of videos available for streaming only. Many of the videos are recent popular motion pictures.